Sofa



FIG. 1 is a front perspective view of a sofa showing our new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a second front perspective view thereof;

FIG. 4 is a second rear perspective view thereof;

FIG. 5 is a right side perspective view thereof;

FIG. 6 is a left side perspective view thereof;

FIG. 7 is a top perspective view thereof;

FIG. 8 is an enlarged fragmentary perspective view thereof, showing the right end; and,

FIG. 9 is an enlarged fragmentary perspective view thereof, showing the center. 

CLAIM The ornamental design for a sofa, as shown and described. 